%0 Journal Article %T Transformation of Consumer's Role in Marketing Evolution %A Gercik, V.A. %K marketing concept, relationship marketing, machine-building enterprise, enterprise activity, value chain, consumer trust, co-creation %J Bulletin of Kemerovo State University. Series: Political, Sociological and Economic sciences %D 2022 %N 2022 %P 4 %I Kemerovo State University